What do you picture when you imagine a hedge-fund office? A noisy trading floor full of hedge-fund guys in fleece vests? Two Sigma, a $45 billion hedge-fund firm that uses advanced technologies to find investment opportunities, is a little different. The firm, which says it has seen head count grow by more than 400% in the past seven years, is as much a technology company as it is a finance company, analyzing over 10,000 data sources to find patterns in markets. That approach seems to have paid off. Two Sigma ranked as the fifth-biggest hedge fund in the world in Institutional Investor's Alpha's 2017 Hedge Fund 100 ... (full story)